1 /* $OpenBSD: db_machdep.h,v 1.17 2006/11/29 22:40:13 miod Exp $ */
2 /* $NetBSD: db_machdep.h,v 1.9 1996/05/03 19:23:59 christos Exp $ */
3
4 /*
5 * Mach Operating System
6 * Copyright (c) 1991,1990 Carnegie Mellon University
7 * All Rights Reserved.
8 *
9 * Permission to use, copy, modify and distribute this software and its
10 * documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22 * School of Computer Science
23 * Carnegie Mellon University
24 * Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie Mellon
27 * the rights to redistribute these changes.
28 */
29
30 #ifndef _I386_DB_MACHDEP_H_
31 #define _I386_DB_MACHDEP_H_
32
33 /*
34 * Machine-dependent defines for new kernel debugger.
35 */
36
37 #include <sys/param.h>
38 #include <uvm/uvm_extern.h>
39 #include <machine/trap.h>
40
41 typedef vaddr_t db_addr_t; /* address - unsigned */
42 typedef long db_expr_t; /* expression - signed */
43
44 typedef struct trapframe db_regs_t;
45 extern db_regs_t ddb_regs; /* register state */
46 #define DDB_REGS (&ddb_regs)
47
48 #define PC_REGS(regs) ((db_addr_t)(regs)->tf_eip)
49 #define SET_PC_REGS(regs, value) (regs)->tf_eip = (int)(value)
50
51 #define BKPT_INST 0xcc /* breakpoint instruction */
52 #define BKPT_SIZE (1) /* size of breakpoint inst */
53 #define BKPT_SET(inst) (BKPT_INST)
54
55 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_eip -= BKPT_SIZE)
56
57 #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T)
58 #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T)
59
60 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
61 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15)
62
63 #define I_CALL 0xe8
64 #define I_CALLI 0xff
65 #define I_RET 0xc3
66 #define I_IRET 0xcf
67
68 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
69 #define inst_return(ins) (((ins)&0xff) == I_RET)
70 #define inst_call(ins) (((ins)&0xff) == I_CALL || \
71 (((ins)&0xff) == I_CALLI && \
72 ((ins)&0x3800) == 0x1000))
73 #define inst_load(ins) 0
74 #define inst_store(ins) 0
75
76 #define DB_MACHINE_COMMANDS
77
78 /* macros for printing OS server dependent task name */
79
80 #define DB_TASK_NAME(task) db_task_name(task)
81 #define DB_TASK_NAME_TITLE "COMMAND "
82 #define DB_TASK_NAME_LEN 23
83 #define DB_NULL_TASK_NAME "? "
84 #define DB_ELF_SYMBOLS
85 #define DB_ELFSIZE 32
86
87 /*
88 * Constants for KGDB.
89 */
90 typedef long kgdb_reg_t;
91 #define KGDB_NUMREGS 16
92 #define KGDB_BUFLEN 512
93
94 #define KGDB_ENTER breakpoint()
95
96 #if 0
97 void db_task_name(/* task_t */);
98 #endif
99
100 /* macro for checking if a thread has used floating-point */
101
102 #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0)
103
104 int kdb_trap(int, int, db_regs_t *);
105
106 void db_machine_init(void);
107 int db_enter_ddb(void);
108 void db_startcpu(int cpu);
109 void db_stopcpu(int cpu);
110 void i386_ipi_db(struct cpu_info *);
111
112 extern struct mutex ddb_mp_mutex;
113
114 /* For ddb_state */
115 #define DDB_STATE_NOT_RUNNING 0
116 #define DDB_STATE_RUNNING 1
117 #define DDB_STATE_EXITING 2
118
119 #endif /* _I386_DB_MACHDEP_H_ */